Update patch version for message about release notes

Author: josh-wong

src/data/notifications.js

@@ -3,12 +3,12 @@
 const notificationsList = [
   {
     message: {
-      en: 'Check out the release notes for ScalarDB 3.15.3',
-      ja: 'ScalarDB 3.15.3 のリリースノートをご覧ください'
+      en: 'Check out the release notes for ScalarDB 3.15.4',
+      ja: 'ScalarDB 3.15.4 のリリースノートをご覧ください'
     },
     url: {
-      en: 'releases/release-notes#v3153?utm_source=docs-site&utm_medium=notifications',
-      ja: 'releases/release-notes#v3153?utm_source=docs-site&utm_medium=notifications'
+      en: 'releases/release-notes#v3154?utm_source=docs-site&utm_medium=notifications',
+      ja: 'releases/release-notes#v3154?utm_source=docs-site&utm_medium=notifications'
     },
     unread: true
   },